I am pleased to say that your judge & jury stance is the exception not the rule. Everyone I have spoken to is shocked and saddened that the gang of four and their banter are no more. The excellent barmaid you refer to, who used to join in with the fun in the lounge, has come and gone a number of times. So yes, a pure coincidence.
Did you personally witness the questions and answers that led to the 4's barring? If not and you haven't discussed it with them, you are relying on hearsay, which in any bar can get totally distorted.